ANOTHER cam spec thread
08-02-2009, 02:51 AM
#1
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ANOTHER cam spec thread Yes, I know..a ton of them out there. I've been searching, lots of great opinions/advice.
Now, let's try to find one for my car.
Pacesetter LTs
Flowmaster merge collector
Powerbond 25% underdrive pulley
lid
Yank SS3600
3.50 gears
I recently bought 799 heads (same as LS2 243s) that will be getting installed. They will be left unmodified. And I plan on using the single PAC springs.
I do have a nitrous kit, but I'd like a cam geared more towards N/A because I rarely use the nitrous and it's only at the track. So the car needs to be fun on the weekends. (100-125 shot max)
Now, let's try to find one for my car.
Pacesetter LTs
Flowmaster merge collector
Powerbond 25% underdrive pulley
lid
Yank SS3600
3.50 gears
I recently bought 799 heads (same as LS2 243s) that will be getting installed. They will be left unmodified. And I plan on using the single PAC springs.
I do have a nitrous kit, but I'd like a cam geared more towards N/A because I rarely use the nitrous and it's only at the track. So the car needs to be fun on the weekends. (100-125 shot max)
(give it 11.25scr and an intake and go have fun)
08-02-2009, 05:20 PM
#5
Ya it will thump pretty good with 9 degrees of overlap. Predator-Z specced LSL lobes and I do not think it is recommended to run the single beehive springs with those lobes. A little to agressive for that. You will need to run xfi lobes to run those springs. That cam should sound similar to my 224.
http://www.youtube.com/watch?v=Ed8s0ovoQDU
http://www.youtube.com/watch?v=Ed8s0ovoQDU
08-02-2009, 06:29 PM
#6
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it kills me how so many are willing to fork out $400 for a custom cam but can't spend $25 for pat g to spec them a cam that works with the gearing and scr and figure the dcr for you.
and tell you what push rods and springs to run.
too bad you cant buy commen sense. it would be worth every penny to most. LOL
or you could down load a dcr calculater and do some calculations of youre own if you cant do the $25 for one to be specced but most would rather ask a stranger what will make them happy. with out fly cutting of course
and tell you what push rods and springs to run.
too bad you cant buy commen sense. it would be worth every penny to most. LOL
or you could down load a dcr calculater and do some calculations of youre own if you cant do the $25 for one to be specced but most would rather ask a stranger what will make them happy. with out fly cutting of course
08-02-2009, 06:47 PM
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it kills me how so many are willing to fork out $400 for a custom cam but can't spend $25 for pat g to spec them a cam that works with the gearing and scr and figure the dcr for you.
and tell you what push rods and springs to run.
too bad you cant buy commen sense. it would be worth every penny to most. LOL
and tell you what push rods and springs to run.
too bad you cant buy commen sense. it would be worth every penny to most. LOL
Sorry, I didn't realize Pat G charged a fee....and I've seen some pretty good results from Predator-Z's recommendations.
Maybe he should start charging.
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08-03-2009, 02:06 AM
#8
Spend $50 and have your heads milled .020", this will put them right at 62cc's. With the $28 GM MLS gaskets you will be right at 11:1 compression. Otherwise stock LS6 heads are around 64.5cc's and 10.5:1 compression. The GM MLS gaskets are .051" thick and if your pistons stick out .006-.008" you will have a great quench around .045". I run 9.0:1 DCR and 11:1 static compression with no issues on 92 octane fuel, very torquey setup and has no loss of power anywhere. Also as the bare minimum atleast lap your valves in, GM's valve job is a joke and is far from concentric.
08-03-2009, 08:50 AM
#9
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I really like how my cam performs and how it drives.. I can be in overdrive at 38 mph and it won't buck just drives smooth.. 230/236 612/607 on a 114.. The curve is flat and top end pull is insane.
08-03-2009, 06:26 PM
#10
That said, making the cam work does take some patience and requires the setup to be spot on. XE-R lobes will come close to the same amount of power with a little greater margin for error. The difference is usually in the details.
08-04-2009, 03:44 AM
#11
TECH Senior Member
Pac 1518 will handle those lobes but not the 918s, there is a difference between the 2.
Comp cam came up with dual 926 springs around the same time they released the LSL (LSR) lobes and holy behold, suddenly only the 926 will handle the lobes
.600>.050 variance on LSL is 50 and XE-R 49 so off the seat XE-R is actualy sharper.
Comp cam came up with dual 926 springs around the same time they released the LSL (LSR) lobes and holy behold, suddenly only the 926 will handle the lobes
.600>.050 variance on LSL is 50 and XE-R 49 so off the seat XE-R is actualy sharper.
08-04-2009, 06:22 AM
#13
TECH Senior Member
It also depends on the valve you are using and rpm at which you are spinning.
The Pac 1518 are within the pressure parameters of the LSL lobes.
In general as you well know, poeple tend to use duals for more "peace of mind".
If those lobes were so harsh, springs would be just part of the worries and those lobes then should only be run with Morrel or Comp "R" lifters, but they are working fine with LS7s and such.
I have some on 850-16 comps with no issues to date.
If valvetrain is well centered (proper geometry) and right preload on lifters, the LSL are easier on the valvetrain than LSKs.
Pac 1518
Premium Nitrided Beehive LS1 Spring
OD: 1.290"
130 lbs @ 1.800"
337 lbs @ 1.150"
Lift: 0.650"
The Pac 1518 are within the pressure parameters of the LSL lobes.
In general as you well know, poeple tend to use duals for more "peace of mind".
If those lobes were so harsh, springs would be just part of the worries and those lobes then should only be run with Morrel or Comp "R" lifters, but they are working fine with LS7s and such.
I have some on 850-16 comps with no issues to date.
If valvetrain is well centered (proper geometry) and right preload on lifters, the LSL are easier on the valvetrain than LSKs.
Pac 1518
Premium Nitrided Beehive LS1 Spring
OD: 1.290"
130 lbs @ 1.800"
337 lbs @ 1.150"
Lift: 0.650"
Last edited by PREDATOR-Z; 08-04-2009 at 07:10 AM.
